CN109698056B - Three-phase three-dimensional iron core structure that stacks - Google Patents
Three-phase three-dimensional iron core structure that stacks Download PDFInfo
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- CN109698056B CN109698056B CN201710981581.5A CN201710981581A CN109698056B CN 109698056 B CN109698056 B CN 109698056B CN 201710981581 A CN201710981581 A CN 201710981581A CN 109698056 B CN109698056 B CN 109698056B
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- China
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- iron core
- trapezoid
- material stacking
- section
- silicon steel
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 143
- 239000000463 material Substances 0.000 claims abstract description 66
- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 27
- 238000004804 winding Methods 0.000 abstract description 10
- 239000010410 layer Substances 0.000 abstract description 7
- 239000002356 single layer Substances 0.000 abstract description 6
- 238000005520 cutting process Methods 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 14
- 239000011162 core material Substances 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 7
- 238000003475 lamination Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000004886 process control Methods 0.000 description 2
- 241000057467 Quadraseta trapezoides Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/266—Fastening or mounting the core on casing or support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/245—Magnetic cores made from sheets, e.g. grain-oriented
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The invention relates to a three-phase three-dimensional stacked iron core structure, which is characterized in that a semicircular iron core section formed by combining a trapezoid material stacking part and a rectangular material stacking part is used as an iron core single frame, and the three iron core single frames are spliced in pairs in the vertical direction to form a three-dimensional iron core; the trapezoid material stacking part adopts a coiled iron core to longitudinally and diagonally cut, and then transversely cuts according to the design angle and the length of the single silicon steel sheet to form a plurality of single silicon steel sheets, the single silicon steel sheets adopt stacking forms to form a trapezoid stage with the cross section, and the trapezoid material stacking part with the cross section of a plurality of trapezoid stages is formed by adopting stacking forms. The invention increases the filling coefficient of the section of the iron core; the single-layer or multi-layer structure is adopted, and the multi-layer square iron core plates are stacked to form a three-phase three-dimensional stacked iron core, so that iron core winding equipment is omitted; the three-phase three-dimensional stacked iron core structure with three iron core columns and circular cross sections is formed by adopting a stepping structure among single layers or multiple layers.
Description
Technical Field
The invention relates to a transformer core structure, in particular to a three-phase three-dimensional stacked core structure.
Background
The iron core opening method of the three-phase three-dimensional iron core in China comprises a trapezoid material closed three-dimensional iron core winding structure, a trapezoid material opening folding three-dimensional iron core structure and a rectangular material lamination three-dimensional iron core structure.
As shown in fig. 1A to 1C, the trapezoidal closed wound iron core is a traditional structure of a three-dimensional wound iron core transformer, and is formed by sequentially winding trapezoidal material belts with several specifications, the silicon steel belts are tightly wound, and the filling area of the iron core is large. However, the traditional winding machine cannot meet the process requirement, special winding equipment must be purchased, the winding efficiency is low, on the other hand, the coil can be wound after the iron core is wound and the test is qualified, and the production period is prolonged.
As shown in fig. 2A-2B, the trapezoidal open folding iron core structure perfectly merges the traditional rectangular stacked iron core structure and the closed three-dimensional iron core structure through a shearing and folding process on the basis of the traditional trapezoidal closed iron core, the upper iron yoke is open, the iron core can be sleeved after the coil is wound by using a traditional winding machine, other winding equipment is not needed to be added, the coil is produced in advance and can be assembled quickly, the coil and the iron core can be manufactured separately, and the production and manufacturing period is shortened. The filling area of the iron core is smaller than that of the trapezoidal closed-end rolled iron core structure, but the no-load process coefficient is larger, and the material cost is increased.
As shown in fig. 3, the rectangular material laminated type three-dimensional iron core structure adopts a traditional laminated type cutting method, 4 groups of single sheets are combined into a frame body in each layer of the same plane, a plurality of frame bodies are combined into a semicircular section, three semicircular section frame bodies are combined into a three-dimensional iron core, the iron core filling area is small, the single sheets are processed to remove sharp corners, the production and manufacturing procedures are increased, and the iron core manufacturing period is long.
In recent years, the domestic demand for three-dimensional wound core transformers is gradually increasing. Because the three-dimensional coiled iron core is completely symmetrical in space, various electromagnetic parameters are easier to ensure than the stacked iron core. The iron core has the characteristics of material saving, energy saving, symmetrical three-phase magnetic circuits, small exciting current, low no-load loss, small harmonic wave, low noise and the like. However, the three-dimensional coiled iron core has strict requirements on the manufacturing process, and the performance parameters have close relation with the control of the process.
The laminated iron core product has simple manufacturing process and simple performance control measures, but the sectional area filling coefficient is lower when the material cutting and laminating structure is applied to a three-phase three-dimensional laminated iron core structure.
Disclosure of Invention
Aiming at the problems that the manufacturing process of the trapezoid closed three-dimensional coiled iron core in the prior art needs special equipment, strict process control requirements and long manufacturing period; the folding process of the trapezoid material opening folding type three-dimensional iron core structure needs special equipment, the no-load loss process coefficient is too high, the product is sleeved, and the inserting sheet is difficult; the invention aims to solve the problems that the section filling coefficient of the rectangular material laminated three-dimensional iron core structure is too low, the lamination needs sharp corner removing treatment and the like, and provides a laminated and rolled combined type material cutting three-phase three-dimensional laminated iron core structure.
In order to solve the technical problems, the invention adopts the following technical scheme:
The invention relates to a three-phase three-dimensional stacked iron core structure, which is characterized in that a semicircular iron core section formed by combining a trapezoid material stacking part and a rectangular material stacking part is used as an iron core single frame, and the three iron core single frames are spliced in pairs in the vertical direction to form a three-dimensional iron core.
The trapezoid material stacking part adopts a coiled iron core to longitudinally and diagonally cut, and then transversely cuts according to the design angle and the length of the single silicon steel sheet to form a plurality of single silicon steel sheets, the single silicon steel sheets adopt stacking forms to form a trapezoid stage with the cross section, and the trapezoid material stacking part with the cross section of a plurality of trapezoid stages is formed by adopting stacking forms.
The rectangular material stacking part adopts a coiled iron core to longitudinally and linearly cut, the lengths of the single silicon steel sheets are transversely sheared according to a design angle to form a plurality of single silicon steel sheets, the single silicon steel sheets form a rectangular stage in cross section in a stacking mode, and the rectangular stages with different widths form a rectangular material stacking part in cross section in a stacking mode.
The semicircular iron core section takes one end point of the semicircular diameter as an apex, takes a 30-degree angle as a straight line by taking the diameter as an edge, the straight line is a boundary line between a trapezoid material stacking part and a rectangular material stacking part, the arched part is the rectangular material stacking part, and the rest parts are trapezoid material stacking parts.
The invention has the following beneficial effects and advantages:
1. The invention combines the advantages of three iron core structures, adopts oblique line cutting to the stages included in the splicing line of the iron core section, and increases the filling coefficient of the iron core section according to the linear cutting of the rest stages; the single-layer or multi-layer structure is adopted, and the multi-layer square iron core plates are stacked to form a three-phase three-dimensional stacked iron core, so that iron core winding equipment is omitted; the three-phase three-dimensional stacked iron core structure with three iron core columns and circular cross sections is formed by adopting a stepping structure among single layers or multiple layers.
2. The invention adopts a method of stacking and rolling combined type cutting on the basis of the structure and the performance characteristics of the product, not only can increase the filling coefficient of the sectional area of the iron core, but also can improve the utilization rate of the silicon steel sheet in a combined type cutting mode, and simultaneously, the structure can adopt a method for reducing the height of an iron yoke, thereby further reducing the material consumption.
3. The cross section of the core column of the iron core is similar to that of the coiled iron core, the material of the trapezoid closed-end coiled iron core is in a lamination mode, the original coiling structure of the trapezoid closed-end coiled iron core is changed, technical measures such as annealing are not needed, and the manufacturing process is the same as that of a conventional laminated iron core.
4. The cross section of the invention is formed by combining a closed three-dimensional coiled iron core material (i.e. trapezoid material) overlapping part and a straight-line open three-dimensional coiled iron core material (i.e. rectangular material) overlapping part, so that the filling coefficient of the iron core section is close to that of the trapezoid material closed three-dimensional coiled iron core; the iron yoke part of the iron core achieves the effect of reducing the material consumption by adopting a structure for reducing the height of the iron yoke.
5. The magnetic circuit structure of the three-dimensional stacked iron core is the same as that of the three-dimensional rolled iron core, so that the three-dimensional stacked iron core has the characteristics of small exciting current, small no-load loss, small harmonic wave, low noise and the like.
6. The effective sectional area of the three-dimensional iron core structure is between the three-dimensional coiled iron core and the iron core, and the filling rate of the sectional area of the iron core is higher; the blanking and blanking use amount of the trapezoid sectional area ladder part is equal to that of the three-dimensional coiled iron core blanking and blanking part, the silicon steel sheet residual material is less, and the saving effect is obvious; the blanking and cutting of the section area part of the linear cutting (namely the rectangular material) is similar to that of the conventional rectangular material stacked iron core, and the manufacturing process is simple.
7. The three-dimensional iron core stacking structure cancels the original three-dimensional iron core rolling annealing process; the combined section three-dimensional stacked iron core structure can reduce the height of iron yoke laminations and reduce the material consumption.
Drawings
Fig. 1A is a schematic diagram of a single frame structure of a conventional trapezoidal closed three-dimensional coiled iron core;
FIG. 1B is a side view of FIG. 1A;
FIG. 1C is a top view of a three-dimensional structure of a traditional trapezoidal closed three-dimensional coiled iron core;
fig. 2A is a schematic diagram of a single frame structure of a conventional trapezoidal open three-dimensional coiled iron core;
FIG. 2B is a top view of a three-dimensional structure of a conventional trapezoidal open-ended three-dimensional coiled iron core;
FIG. 3 is a perspective stacked iron core structure of a traditional rectangular material;
fig. 4A is a schematic diagram of a three-dimensional stacked iron core single frame structure of the present invention;
FIG. 4B is a side view of FIG. 4A;
fig. 4C is a top view of a three-dimensional stacked core structure of the present invention;
fig. 4D is a schematic structural diagram of the combination of the trapezoid material stacking portion and the rectangular material stacking portion in the present invention.
Wherein 1 is a trapezoid material stacking part, 2 is a rectangular material stacking part, and 3 is an iron core single frame.
Detailed Description
The invention is further elucidated below in connection with the drawings of the specification.
As shown in fig. 4A to 4C, in the three-phase three-dimensional stacked iron core structure with stacked and rolled combined material, a semicircular iron core section formed by combining a trapezoid material stacking part 1 and a rectangular material stacking part 2 is used as an iron core single frame 3, and the three iron core single frames 3 are spliced in pairs in the vertical direction to form a three-dimensional iron core.
The trapezoid material stacking part 1 adopts a coiled iron core to longitudinally and diagonally cut, and then transversely cuts according to the design angle and the length of the single silicon steel sheet to form a plurality of single silicon steel sheets, the single silicon steel sheets adopt stacking forms to form the trapezoid stages, the same or different trapezoid stages adopt stacking forms to form the trapezoid material stacking part 1 with the cross section being a plurality of trapezoid stage stacking, compared with the traditional linear cutting lamination type three-dimensional iron core structure, the filling rate of the iron core cross section is increased, meanwhile, the silicon steel sheet residual materials are less, and the saving effect is obvious.
The rectangular material arc (namely 120 DEG) stacking part adopts silicon steel longitudinal linear cutting, then the lengths of the single silicon steel sheets are transversely sheared according to the designed 45 DEG oblique angle to form a plurality of single silicon steel sheets, the single silicon steel sheets form a rectangular stage in cross section in a stacking mode, and the rectangular stages with different widths form an arc stacking part in cross section in a stacking mode. The filling rate of the section of the iron core of the partial structure is the same as that of a conventional round or long round iron core, and the manufacturing process is simple.
As shown in fig. 4D, the trapezoidal material stacking portion 1 and the rectangular material stacking portion 2 are combined together as: the semicircular iron core section takes one end point of the semicircular diameter as an apex, takes a 30-degree angle as a straight line by taking the diameter as an edge, the straight line is the boundary between the trapezoid material stacking part 1 and the rectangular material stacking part 2, the arched part is the rectangular material stacking part 2, and the rest part is the trapezoid material stacking part 1.
The overall finished product performance of the three-dimensional stacked iron core with the splicing structure is higher than that of a conventional rectangular material with a round section, and is close to that of a conventional three-dimensional rolled iron core; the process control measure is similar to the conventional laminated iron core manufacturing process, and the operation is simple and convenient.
The combined section three-dimensional stacked iron core structure can meet the performance parameter requirements by canceling the original three-dimensional rolled iron core annealing process; the effective sectional area of the iron core structure is between the three-dimensional coiled iron core and the stacked iron core, so that the height of iron yoke laminations can be reduced, and the material consumption is reduced; the filling rate of the sectional area of the iron core is high.
The invention integrates the advantages of three iron core structures in the prior art, adopts oblique line cutting to the stages included in the splicing line of the iron core section, and increases the filling coefficient of the iron core section by cutting the rest stages according to the straight line.
The three-phase three-dimensional stacked iron core is formed by stacking a plurality of layers of square iron core sheets (namely iron core single frames) in a stepping structure between single layers, and iron core winding equipment is omitted. Single-layer or multi-layer three-phase three-dimensional stacked iron core structure with three iron core columns and circular cross section formed by adopting stepping structure
On the basis of the product structure and the performance characteristics, the method of stacking and rolling combined type cutting is adopted, so that not only can the filling coefficient of the sectional area of the iron core be increased, but also the utilization rate of the silicon steel sheet is improved in a combined type cutting mode, and meanwhile, the structure can adopt the method of reducing the height of the iron yoke, so that the material consumption is further reduced.
Claims (1)
1. The utility model provides a three-phase three-dimensional iron core structure that stacks which characterized in that: the semicircular iron core section formed by combining the trapezoid material stacking part and the rectangular material stacking part is used as an iron core single frame, and the three iron core single frames are spliced in pairs in the vertical direction to form a three-dimensional iron core;
The trapezoid material stacking part adopts a coiled iron core to longitudinally and diagonally cut, and then transversely cuts according to a design angle and the length of a single silicon steel sheet to form a plurality of single silicon steel sheets, wherein the single silicon steel sheets adopt stacking forms to form a stage with a trapezoid cross section, and the plurality of stages with the same or different trapezoids adopt stacking forms to form a trapezoid material stacking part with a cross section of a plurality of trapezoid stages;
The rectangular material stacking part adopts a coiled iron core to longitudinally and linearly cut, the lengths of the single silicon steel sheets are transversely sheared according to a design angle to form a plurality of single silicon steel sheets, the single silicon steel sheets form a rectangular stage in cross section in a stacking mode, and the rectangular stages with different widths form a rectangular material stacking part in cross section in a stacking mode;
The semicircular iron core section takes one end point of the semicircular diameter as an apex, takes a 30-degree angle as a straight line by taking the diameter as an edge, the straight line is a boundary line between a trapezoid material stacking part and a rectangular material stacking part, the arched part is the rectangular material stacking part, and the rest parts are trapezoid material stacking parts.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710981581.5A CN109698056B (en) | 2017-10-20 | 2017-10-20 | Three-phase three-dimensional iron core structure that stacks |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710981581.5A CN109698056B (en) | 2017-10-20 | 2017-10-20 | Three-phase three-dimensional iron core structure that stacks |
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| CN109698056B true CN109698056B (en) | 2024-09-06 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106449041A (en) * | 2016-09-08 | 2017-02-22 | 特变电工股份有限公司 | Three-phase three-dimensional laminated iron core, three-phase three-dimensional laminated iron core-based power transformer and assembling method |
| CN106783061A (en) * | 2015-11-19 | 2017-05-31 | 齐侠 | A kind of folding stereo delta transformer open coil iron core of section hexagon |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0888128A (en) * | 1994-09-19 | 1996-04-02 | Hitachi Ltd | Polyphase transformer core |
| CN2487084Y (en) * | 2001-07-13 | 2002-04-17 | 周根喜 | Rolling iron core of three phase transformer |
| CN101640107B (en) * | 2009-07-02 | 2011-08-03 | 无锡市普天铁心有限公司 | Full bias seam iron core stepping stacking method |
| CN101777416B (en) * | 2010-03-15 | 2011-12-14 | 贵阳新星变压器有限公司 | Rectangular fillet iron core for shell type transformer |
| CN102290201B (en) * | 2011-04-28 | 2012-11-21 | 上海固缘电力科技有限公司 | Three-dimensional three-phase amorphous alloy transformer iron core |
| CN205140693U (en) * | 2015-12-08 | 2016-04-06 | 齐会南 | Compound transformer core of silicon wafer |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106783061A (en) * | 2015-11-19 | 2017-05-31 | 齐侠 | A kind of folding stereo delta transformer open coil iron core of section hexagon |
| CN106449041A (en) * | 2016-09-08 | 2017-02-22 | 特变电工股份有限公司 | Three-phase three-dimensional laminated iron core, three-phase three-dimensional laminated iron core-based power transformer and assembling method |
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